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Gas sensor array for detecting indoor gas pollution

A gas sensor and gas pollution technology, applied in the field of gas sensors and arrays, can solve problems such as false alarms, low selectivity, and non-discovery

Inactive Publication Date: 2004-11-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

Most of the currently used gas sensors use tin dioxide as a sensitive material, but there are problems such as low selectivity and prone to false alarms
According to the search, there is no report on using a plurality of indium tin oxide thin film gas sensors with different indium tin ratios to form a gas sensor array

Method used

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  • Gas sensor array for detecting indoor gas pollution
  • Gas sensor array for detecting indoor gas pollution
  • Gas sensor array for detecting indoor gas pollution

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Embodiment Construction

[0010] As shown in Figure 1, the gas sensor array for detecting indoor gas pollution is composed of five indium tin oxide thin film gas sensors with different indium tin ratios. Their indium / tin atomic ratios are 0.10, 0.20, 0.40, 0.60, and 0.70, respectively. .

[0011] Indium tin oxide thin films with different indium tin ratios were prepared by sol-gel method. with SnCl 2 2H 2 O and InCl 3 4H 2 O is the raw material, dissolve the raw material in a certain amount of absolute ethanol, add a certain amount of glacial acetic acid at the same time, stir the solution for 2 hours while heating, control the temperature of stirring and heating at 60 ° C, and then store it at room temperature for 1-2 days, and finally A homogeneous and transparent solution was obtained. The solution obtained by the above method is coated with a layer of wet film on the hollow ceramic column with the gold electrode prepared in advance, after two steps of pretreatment at 80 °C and 180 °C, it can b...

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Abstract

The gas sensor array for detecting indoor gaseous pollutant consists of several In-Sn oxide film gas sensors with different In / Sn atom ratio within 0-1.0. The sensors with different In / Sn atom ratio have different response to gases, so that the gas sensor array has greatly raised gas selectivity and may be used in identifying benzene, toluene, xylene, formaldehyde and other common indoor pollutant gases.

Description

technical field [0001] The invention relates to a gas sensor and an array for detecting indoor harmful gas. Background technique [0002] Tin oxide is a semiconductor material with a wide range of uses, and has been widely used in gas sensors, transparent conductive films, and other optoelectronic devices. Most of the currently used gas sensors use tin dioxide as a sensitive material, but there are problems such as low selectivity and prone to false alarms. According to the search, there is no report on using a plurality of indium tin oxide thin film gas sensors with different indium tin ratios to form a gas sensor array. Contents of the invention [0003] The object of the present invention is to provide a gas sensor array with high selectivity and capable of detecting several indoor gas pollutions. [0004] The gas sensor array for detecting indoor gas pollution of the present invention is characterized in that the ar...

Claims

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Application Information

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IPC IPC(8): G01N27/62
Inventor 季振国孙兰侠何振杰
Owner ZHEJIANG UNIV
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